TODAY, There's A Phenomenon of Days Without A Shadow, Here's the Time of the Occurrence

TRIBUNBATAM.id, BATAM -  These are the following of a complete schedule of the phenomenon of No Shadow Day in Indonesia.

The phenomenon of No Shadow Day is known have started since September and continues until this October.

Several capitals that have already received it this month include Palembang (1 October 2019), Banjarmasin (2 October 2019), Bengkulu, Ambon and Kendari (3 October 2019), Makassar (6 October 2019) and Bandar Lampung (7 October 2019).

Today, on October 9, 2019, the main culmination of a day without a shadow will occur in Central Jakarta at 11:40.05 WIB and Serang at 11.42.47 WIB. 

The schedule for the main culmination times in the next provincial capitals are:

Bandung on October 11, 2019 at 11.36.27 WIB

Semarang on 11 October 2019 at 11:25.06 WIB

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Surabaya on October 12, 2019 at 11:15.46 WIB

Yogyakarta on October 13, 2019 at 11.24.53 WIB

Denpasar on October 16, 2019 at 12.04.49 WITA

Mataram on October 16, 2019 at 12.01.16 WITA

Kupang on October 20, 2019 at 11.30.34 WITA

For the main culmination in other cities, you can look at the BMKG link. 

Amateur astronomer, Marufin Sudibyo, explained that a day without a shadow is a day for a particular place where an object that stands upright will lose its shadow when the Sun reaches its culmination point above (istiwa') or in transit conditions.

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Reporting from the BMKG press release, this phenomenon occurs because the equatorial field or rotation of the Earth is not a place to coincide with the ecliptic field or the revolution of the Earth. 

As a result, the position of the Sun from the Earth will be seen to change continuously throughout the year between 23.5 degrees LU to 23.5 degrees LS.

This is called the daily apparent motion of the Sun.

Due to Indonesia's position around the equator, we can also experience the main culmination of Indonesian territory twice a year, when the Sun is at the equator.

To note, this year the Sun is right at the equator on March 21, 2019 at 05.00 WIB and 23 September 2019 at 14.51 WIB. (Kompas.com/Shierine Wangsa Wibawa) 

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